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PR: 2696

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Submitted by: Rob Austein <sra@hactrn.net>

Fix inverted range problem in RFC3779 code.

Thanks to Andrew Chi for generating test cases for this bug.
This commit is contained in:
Dr. Stephen Henson 2012-02-23 21:31:37 +00:00
parent 4d3670fa50
commit ef570cc869
1 changed files with 55 additions and 8 deletions
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63
crypto/x509v3/v3_asid.c
View File

@ -358,6 +358,20 @@ static int ASIdentifierChoice_is_canonical(ASIdentifierChoice *choice)
goto done;
}
/*
* Check for inverted range.
*/
i = sk_ASIdOrRange_num(choice->u.asIdsOrRanges) - 1;
{
ASIdOrRange *a = sk_ASIdOrRange_value(choice->u.asIdsOrRanges, i);
ASN1_INTEGER *a_min, *a_max;
if (a != NULL && a->type == ASIdOrRange_range) {
extract_min_max(a, &a_min, &a_max);
if (ASN1_INTEGER_cmp(a_min, a_max) > 0)
goto done;
}
}
ret = 1;
done:
@ -392,9 +406,18 @@ static int ASIdentifierChoice_canonize(ASIdentifierChoice *choice)
return 1;
/*
* We have a list. Sort it.
* If not a list, or if empty list, it's broken.
*/
if (choice->type != ASIdentifierChoice_asIdsOrRanges ||
sk_ASIdOrRange_num(choice->u.asIdsOrRanges) == 0) {
X509V3err(X509V3_F_ASIDENTIFIERCHOICE_CANONIZE,
X509V3_R_EXTENSION_VALUE_ERROR);
return 0;
}
/*
* We have a non-empty list. Sort it.
*/
OPENSSL_assert(choice->type == ASIdentifierChoice_asIdsOrRanges);
sk_ASIdOrRange_sort(choice->u.asIdsOrRanges);
/*
@ -414,6 +437,13 @@ static int ASIdentifierChoice_canonize(ASIdentifierChoice *choice)
*/
OPENSSL_assert(ASN1_INTEGER_cmp(a_min, b_min) <= 0);
/*
* Punt inverted ranges.
*/
if (ASN1_INTEGER_cmp(a_min, a_max) > 0 ||
ASN1_INTEGER_cmp(b_min, b_max) > 0)
goto done;
/*
* Check for overlaps.
*/
@ -465,12 +495,26 @@ static int ASIdentifierChoice_canonize(ASIdentifierChoice *choice)
break;
}
ASIdOrRange_free(b);
sk_ASIdOrRange_delete(choice->u.asIdsOrRanges, i + 1);
(void) sk_ASIdOrRange_delete(choice->u.asIdsOrRanges, i + 1);
i--;
continue;
}
}
/*
* Check for final inverted range.
*/
i = sk_ASIdOrRange_num(choice->u.asIdsOrRanges) - 1;
{
ASIdOrRange *a = sk_ASIdOrRange_value(choice->u.asIdsOrRanges, i);
ASN1_INTEGER *a_min, *a_max;
if (a != NULL && a->type == ASIdOrRange_range) {
extract_min_max(a, &a_min, &a_max);
if (ASN1_INTEGER_cmp(a_min, a_max) > 0)
goto done;
}
}
OPENSSL_assert(ASIdentifierChoice_is_canonical(choice)); /* Paranoia */
ret = 1;
@ -498,6 +542,7 @@ static void *v2i_ASIdentifiers(const struct v3_ext_method *method,
struct v3_ext_ctx *ctx,
STACK_OF(CONF_VALUE) *values)
{
ASN1_INTEGER *min = NULL, *max = NULL;
ASIdentifiers *asid = NULL;
int i;
@ -508,7 +553,6 @@ static void *v2i_ASIdentifiers(const struct v3_ext_method *method,
for (i = 0; i < sk_CONF_VALUE_num(values); i++) {
CONF_VALUE *val = sk_CONF_VALUE_value(values, i);
ASN1_INTEGER *min = NULL, *max = NULL;
int i1, i2, i3, is_range, which;
/*
@ -578,18 +622,19 @@ static void *v2i_ASIdentifiers(const struct v3_ext_method *method,
max = s2i_ASN1_INTEGER(NULL, s + i2);
OPENSSL_free(s);
if (min == NULL || max == NULL) {
ASN1_INTEGER_free(min);
ASN1_INTEGER_free(max);
X509V3err(X509V3_F_V2I_ASIDENTIFIERS, ERR_R_MALLOC_FAILURE);
goto err;
}
if (ASN1_INTEGER_cmp(min, max) > 0) {
X509V3err(X509V3_F_V2I_ASIDENTIFIERS, X509V3_R_EXTENSION_VALUE_ERROR);
goto err;
}
}
if (!v3_asid_add_id_or_range(asid, which, min, max)) {
ASN1_INTEGER_free(min);
ASN1_INTEGER_free(max);
X509V3err(X509V3_F_V2I_ASIDENTIFIERS, ERR_R_MALLOC_FAILURE);
goto err;
}
min = max = NULL;
}
/*
@ -601,6 +646,8 @@ static void *v2i_ASIdentifiers(const struct v3_ext_method *method,
err:
ASIdentifiers_free(asid);
ASN1_INTEGER_free(min);
ASN1_INTEGER_free(max);
return NULL;
}